Ylianst/MeshCentral
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Added multi-interface mesh server scanner

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Ylian Saint-Hilaire 2017-09-01 13:45:25 -07:00
parent d8464ddd44
commit 362b23c088
2 changed files with 109 additions and 40 deletions
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147
meshscanner.js
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@ -11,8 +11,8 @@ module.exports.CreateMeshScanner = function (parent) {
obj.parent = parent;
obj.dgram = require('dgram');
obj.common = require('./common.js');
obj.server4 = null;
obj.server6 = null;
obj.servers4 = {};
obj.servers6 = {};
obj.mainTimer = null;
var periodicScanTime = (60000 * 20); // Interval between scans, 20 minutes.
var membershipIPv4 = '239.255.255.235';
@ -20,6 +20,91 @@ module.exports.CreateMeshScanner = function (parent) {
obj.agentCertificatHashHex = parent.certificateOperations.forge.pki.getPublicKeyFingerprint(parent.certificateOperations.forge.pki.certificateFromPem(parent.certificates.agent.cert).publicKey, { md: parent.certificateOperations.forge.md.sha256.create(), encoding: 'hex' });
obj.error = 0;
// Get a list of IPv4 and IPv6 interface addresses
function getInterfaceList() {
var ipv4 = [];
var ipv6 = [];
var interfaces = require('os').networkInterfaces();
for (var i in interfaces) {
var interface = interfaces[i];
for (var j in interface) {
var interface2 = interface[j];
if ((interface2.mac != '00:00:00:00:00:00') && (interface2.internal == false)) {
if (interface2.family == 'IPv4') { ipv4.push(interface2.address); }
if (interface2.family == 'IPv6') { ipv6.push(interface2.address); }
}
}
}
return { ipv4: ipv4, ipv6: ipv6 };
}
// Setup all IPv4 and IPv6 servers
function setupServers() {
var addresses = getInterfaceList();
for (var i in obj.servers4) { obj.servers4[i].xxclear = true; }
for (var i in obj.servers6) { obj.servers6[i].xxclear = true; }
for (var i in addresses.ipv4) {
var localAddress = addresses.ipv4[i];
if (obj.servers4[localAddress] != null) {
// Server already exists
obj.servers4[localAddress].xxclear = false;
} else {
// Create a new IPv4 server
var server4 = obj.dgram.createSocket("udp4");
server4.xxclear = false;
server4.xxtype = 4;
server4.xxlocal = localAddress;
server4.on('error', function (err) { console.log("ERROR: Server port " + server4.xxlocal + ":16989 not available, check if server is running twice."); server4.close(); server4 = null; });
server4.bind({ address: server4.xxlocal, port: 16989, exclusive: false }, function () {
try {
server4.setBroadcast(true);
server4.setMulticastTTL(128);
server4.addMembership(membershipIPv4);
server4.on('error', function (error) { console.log('Error: ' + error); });
server4.on('message', function (msg, info) { onUdpPacket(msg, info, server4); });
obj.performScan(server4);
obj.performScan(server4);
} catch (e) { }
});
obj.servers4[localAddress] = server4;
}
}
for (var i in addresses.ipv6) {
var localAddress = addresses.ipv6[i];
if (obj.servers6[localAddress] != null) {
// Server already exists
obj.servers6[localAddress].xxclear = false;
} else {
// Create a new IPv6 server
var server6 = obj.dgram.createSocket("udp6", localAddress);
server6.xxclear = false;
server6.xxtype = 6;
server6.xxlocal = localAddress;
server6.on('error', function (err) { console.log("ERROR: Server port " + server6.xxlocal + ":16989 not available, check if server is running twice.");server6.close(); obj.server6 = null; });
server6.bind({ address: server6.xxlocal, port: 16989, exclusive: false }, function () {
try {
server6.setBroadcast(true);
server6.setMulticastTTL(128);
server6.addMembership(membershipIPv6);
server6.on('error', function (error) { console.log('Error: ' + error); });
server6.on('message', function (msg, info) { onUdpPacket(msg, info, server6); });
performScan(server6);
performScan(server6);
} catch (e) { }
});
obj.servers6[localAddress] = server6;
}
}
for (var i in obj.servers4) { if (obj.servers4[i].xxclear == true) { obj.servers4[i].close(); delete obj.servers4[i]; }; }
for (var i in obj.servers6) { if (obj.servers6[i].xxclear == true) { obj.servers6[i].close(); delete obj.servers6[i]; }; }
}
// Clear all IPv4 and IPv6 servers
function clearServers() {
for (var i in obj.servers4) { obj.servers4[i].close(); delete obj.servers4[i]; }
for (var i in obj.servers6) { obj.servers6[i].close(); delete obj.servers6[i]; }
}
// Start scanning for local network Mesh Agents
obj.start = function () {
if (obj.server4 != null) return;
@ -27,28 +112,7 @@ module.exports.CreateMeshScanner = function (parent) {
obj.multicastPacket4 = Buffer.from("MeshCentral2|" + obj.agentCertificatHashHex.toUpperCase() + '|' + url, 'ascii');
url = (parent.args.notls ? 'ws' : 'wss') + '://[%s]:' + parent.args.port + '/agent.ashx';
obj.multicastPacket6 = Buffer.from("MeshCentral2|" + obj.agentCertificatHashHex.toUpperCase() + '|' + url, 'ascii');
obj.server4 = obj.dgram.createSocket("udp4");
obj.server4.on('error', function(err) { if (obj.error++ == 0) { console.log("ERROR: Server port 16989 not available, check if server is running twice."); } obj.server4.close(); obj.server4 = null; });
obj.server4.bind(16989, function () {
obj.server4.setBroadcast(true)
obj.server4.setMulticastTTL(128);
obj.server4.addMembership(membershipIPv4);
obj.server4.on('error', function (error) { console.log('Error: ' + error); });
obj.server4.on('message', onUdpPacket); // TODO!!! We can't use this server for receive, instead we have to bind a seperate UDP server for each of the network interfaces.
obj.performScan(4);
obj.performScan(4);
});
obj.server6 = obj.dgram.createSocket("udp6");
obj.server6.on('error', function(err) { obj.server6.close(); obj.server6 = null; }); // IPv6 may not be supported.
obj.server6.bind(16989, function () {
obj.server6.setBroadcast(true)
obj.server6.setMulticastTTL(128);
obj.server6.addMembership(membershipIPv6);
obj.server6.on('error', function (error) { console.log('Error: ' + error); });
obj.server6.on('message', onUdpPacket); // TODO!!! We can't use this server for receive, instead we have to bind a seperate UDP server for each of the network interfaces.
obj.performScan(6);
obj.performScan(6);
});
setupServers();
obj.mainTimer = setInterval(obj.performScan, periodicScanTime);
return obj;
}
@ -56,22 +120,27 @@ module.exports.CreateMeshScanner = function (parent) {
// Stop scanning for local network Mesh Agents
obj.stop = function () {
if (obj.mainTimer != null) { clearInterval(obj.mainTimer); obj.mainTimer = null; }
if (obj.server4 != null) { obj.server4.close(); obj.server4 = null; }
if (obj.server6 != null) { obj.server6.close(); obj.server6 = null; }
clearServers();
}
// Look for all Mesh Agents that may be locally reachable, indicating the presense of this server.
obj.performScan = function (mode) {
if ((mode != 6) && (obj.server4 != null)) { obj.server4.send(obj.multicastPacket4, 0, obj.multicastPacket4.length, 16990, membershipIPv4); }
if ((mode != 4) && (obj.server6 != null)) { obj.server6.send(obj.multicastPacket6, 0, obj.multicastPacket6.length, 16990, membershipIPv6); }
obj.performScan = function (server) {
if (server != null) {
if (server.xxtype == 4) { server.send(obj.multicastPacket4, 0, obj.multicastPacket4.length, 16990, membershipIPv4); }
if (server.xxtype == 6) { server.send(obj.multicastPacket6, 0, obj.multicastPacket6.length, 16990, membershipIPv6); }
} else {
for (var i in obj.servers4) { obj.servers4[i].send(obj.multicastPacket4, 0, obj.multicastPacket4.length, 16990, membershipIPv4); }
for (var i in obj.servers6) { obj.servers6[i].send(obj.multicastPacket6, 0, obj.multicastPacket6.length, 16990, membershipIPv6); }
setupServers(); // Check if any network interfaces where added or removed
}
}
// Called when a UDP packet is received from an agent.
function onUdpPacket(msg, info) {
//console.log('Received ' + msg.length + ' bytes from ' + info.address + ':' + info.port + '\n');
function onUdpPacket(msg, info, server) {
// console.log('Received ' + msg.length + ' bytes from ' + info.address + ':' + info.port + ', on interface: ' + server.xxlocal + '.');
if ((msg.length == 64) && (msg.toString('ascii') == obj.agentCertificatHashHex.toUpperCase())) {
if (info.family == 'IPv4') { obj.server4.send(obj.multicastPacket4, 0, obj.multicastPacket4.length, info.port, info.address); }
if (info.family == 'IPv6') { obj.server6.send(obj.multicastPacket6, 0, obj.multicastPacket6.length, info.port, info.address); }
if (server.xxtype == 4) { server.send(obj.multicastPacket4, 0, obj.multicastPacket4.length, info.port, info.address); }
if (server.xxtype == 6) { server.send(obj.multicastPacket6, 0, obj.multicastPacket6.length, info.port, info.address); }
}
}
@ -85,15 +154,15 @@ module.exports.CreateMeshScanner = function (parent) {
//console.log(wakepacket.toString('hex'));
// Send the wake packet 3 times with small time intervals
if (obj.server4) { obj.server4.send(wakepacket, 0, wakepacket.length, 7, "255.255.255.255"); obj.server4.send(wakepacket, 0, wakepacket.length, 16990, membershipIPv4); }
if (obj.server6) { obj.server6.send(wakepacket, 0, wakepacket.length, 16990, membershipIPv6); }
for (var i in obj.servers4) { obj.servers4[i].send(wakepacket, 0, wakepacket.length, 7, "255.255.255.255"); obj.servers4[i].send(wakepacket, 0, wakepacket.length, 16990, membershipIPv4); }
for (var i in obj.servers6) { obj.servers6[i].send(wakepacket, 0, wakepacket.length, 16990, membershipIPv6); }
setTimeout(function () {
if (obj.server4) { obj.server4.send(wakepacket, 0, wakepacket.length, 7, "255.255.255.255"); obj.server4.send(wakepacket, 0, wakepacket.length, 16990, membershipIPv4); }
if (obj.server6) { obj.server6.send(wakepacket, 0, wakepacket.length, 16990, membershipIPv6); }
for (var i in obj.servers4) { obj.servers4[i].send(wakepacket, 0, wakepacket.length, 7, "255.255.255.255"); obj.servers4[i].send(wakepacket, 0, wakepacket.length, 16990, membershipIPv4); }
for (var i in obj.servers6) { obj.servers6[i].send(wakepacket, 0, wakepacket.length, 16990, membershipIPv6); }
}, 200);
setTimeout(function () {
if (obj.server4) { obj.server4.send(wakepacket, 0, wakepacket.length, 7, "255.255.255.255"); obj.server4.send(wakepacket, 0, wakepacket.length, 16990, membershipIPv4); }
if (obj.server6) { obj.server6.send(wakepacket, 0, wakepacket.length, 16990, membershipIPv6); }
for (var i in obj.servers4) { obj.servers4[i].send(wakepacket, 0, wakepacket.length, 7, "255.255.255.255"); obj.servers4[i].send(wakepacket, 0, wakepacket.length, 16990, membershipIPv4); }
for (var i in obj.servers6) { obj.servers6[i].send(wakepacket, 0, wakepacket.length, 16990, membershipIPv6); }
}, 500);
}
}

2
package.json
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@ -1,6 +1,6 @@
{
"name": "meshcentral",
"version": "0.0.6-x",
"version": "0.0.6-y",
"keywords": [
"Remote Management",
"Intel AMT",